Navigation System Data Packet Selection for Bandwidth Optimization
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Solution Overview
Problem
Current navigation systems for motor vehicles with offboard data memory struggle to efficiently transmit and display visual map information, particularly in terms of resolution, location, and bandwidth, leading to suboptimal user experience and increased data costs.
Innovation Solution
A method for selecting and sequencing data packets of visual map information based on the vehicle's location, assumed route, and communication bandwidth, ensuring that only necessary data is transmitted at the appropriate resolution, with prioritization of closer regions and adaptive adjustments for bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all visual map information data packets are transmitted to the motor vehicle, then the completeness of map information is improved, but the bandwidth consumption increases and data transmission time is extended
Solution Approach 1:
The map information is divided into multiple data packets representing different regions. The system selectively transmits only those data packets that are relevant to the vehicle's current location and assumed route, rather than transmitting all available map data. This segmentation approach reduces bandwidth consumption while maintaining the completeness of essential map information.
Solution Approach 2:
The system prioritizes transmitting data packets with higher quality or detail for regions that are closer to the vehicle's current location or along the assumed route, while reducing or omitting transmission for distant regions. This local quality approach ensures that map information is complete where needed most while minimizing overall bandwidth usage.
2Measurement precision
If high resolution data packets are transmitted, then the display quality is improved, but the data transmission time and bandwidth consumption increase
Solution Approach 1:
The system transmits high-resolution data packets only for regions that are currently visible or soon to be visible on the display (along the assumed route), while transmitting lower-resolution or omitted data for distant regions. This ensures display quality is maintained where needed while reducing overall transmission time.
Solution Approach 2:
The system determines in advance which data packets will be needed based on the vehicle's current location and assumed route, and prioritizes transmission of those specific high-resolution packets. This preliminary selection avoids transmitting unnecessary high-resolution data that would increase transmission time without providing corresponding display quality benefits.
3Area of stationary object
If data packets for distant regions are transmitted, then the coverage area is improved, but the relevance to current navigation needs decreases
Solution Approach 1:
The system provides comprehensive coverage for regions along the assumed route and near the vehicle's current location, while reducing or eliminating transmission for distant regions that are less relevant to current navigation needs. This ensures that the most relevant navigation information is complete while minimizing transmission of less relevant data.
Solution Approach 2:
The system segments the map data into regional packets and selectively transmits based on relevance criteria (current location, assumed route, visible area). This segmentation allows the system to maintain coverage of relevant areas while filtering out distant, less relevant regions, thus improving the overall relevance of transmitted information.
4Device complexity
If data packets are transmitted without selection based on location and route, then the simplicity of the transmission process is maintained, but the efficiency of data usage decreases
Solution Approach 1:
The system performs preliminary selection of data packets based on the vehicle's current location, assumed route, and display parameters before transmission. This preliminary action involves determining which regional data packets are relevant and prioritizing their transmission, thereby significantly improving data transmission efficiency without adding substantial complexity to the overall process.
Solution Approach 2:
The transmission process uses feedback from the vehicle's location data and route information to dynamically determine which data packets should be transmitted and in what sequence. This feedback mechanism allows the system to adapt transmission decisions to current navigation needs, improving efficiency while maintaining a relatively simple automated process.
Data Source
AI summary
In a method for operating a navigation system for a motor vehicle having an offboard data memory, spatially separated from the motor vehicle, having data packets of visual map information, divided by region, as well as a display arranged in the motor vehicle, a selection of data packets provided for transmission to the motor vehicle and/or their sequence occur as a function of the resolution of the display, the location of the motor vehicle, an assumed route of the motor vehicle and/or the bandwidth of a communication connection provided for the transmission, the selected data packets being transmitted to the motor vehicle (e.g., in the selected sequence), and visual map information from data packets transmitted to the motor vehicle being represented by the display.